Question

calcule a expressao 3x(4+5x2²):(12-3²)

Answer 1

    $3\times (4+5\times 2^{2})\div (12-3^{2})=$

$=3\times \frac{4+5\times 2^{2}}{12-3^{2}}=$

$=3\times \frac{4+5\times 4}{12-9}=$

$=3\times \frac{4+20}{3}=$

$=3\times \frac{24}{3}=$

$=3\times 8=$

$=24$